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Title: Seeing real-space dynamics of liquid water through inelastic x-ray scattering

Abstract

Water is ubiquitous on earth, but we know little about the real-space motion of molecules in liquid water. We demonstrate that high-resolution inelastic x-ray scattering measurement over a wide range of momentum and energy transfer makes it possible to probe real-space, real-time dynamics of water molecules through the so-called Van Hove function. Water molecules are found to be strongly correlated in space and time with coupling between the first and second nearest-neighbor molecules. The local dynamic correlation of molecules observed here is crucial to a fundamental understanding of the origin of the physical properties of water, including viscosity. The results also suggest that the quantum-mechanical nature of hydrogen bonds could influence its dynamics. Finally, the approach used here offers a powerful experimental method for investigating real-space dynamics of liquids.

Authors:
 [1];  [2]; ORCiD logo [3];  [4]; ORCiD logo [5];  [6]
  1. Univ. of Tennessee, Knoxville, TN (United States). Shull Wollan Center–Joint Inst. for Neutron Sciences; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Shull Wollan Center–Joint Inst. for Neutron Sciences; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  3. Univ. of Tennessee, Knoxville, TN (United States). Shull Wollan Center–Joint Inst. for Neutron Sciences; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology and Soft Matter Division
  4. RIKEN SPring-8 Center (RSC), Hyogo (Japan). Japan Synchrotron Radiation Research Inst.
  5. RIKEN SPring-8 Center (RSC), Hyogo (Japan). Japan Synchrotron Radiation Research Inst., Materials Dynamics Lab.
  6. Univ. of Tennessee, Knoxville, TN (United States). Shull Wollan Center–Joint Inst. for Neutron Sciences; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1429222
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 12; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Iwashita, Takuya, Wu, Bin, Chen, Wei-Ren, Tsutsui, Satoshi, Baron, Alfred Q. R., and Egami, Takeshi. Seeing real-space dynamics of liquid water through inelastic x-ray scattering. United States: N. p., 2017. Web. doi:10.1126/sciadv.1603079.
Iwashita, Takuya, Wu, Bin, Chen, Wei-Ren, Tsutsui, Satoshi, Baron, Alfred Q. R., & Egami, Takeshi. Seeing real-space dynamics of liquid water through inelastic x-ray scattering. United States. doi:10.1126/sciadv.1603079.
Iwashita, Takuya, Wu, Bin, Chen, Wei-Ren, Tsutsui, Satoshi, Baron, Alfred Q. R., and Egami, Takeshi. Fri . "Seeing real-space dynamics of liquid water through inelastic x-ray scattering". United States. doi:10.1126/sciadv.1603079. https://www.osti.gov/servlets/purl/1429222.
@article{osti_1429222,
title = {Seeing real-space dynamics of liquid water through inelastic x-ray scattering},
author = {Iwashita, Takuya and Wu, Bin and Chen, Wei-Ren and Tsutsui, Satoshi and Baron, Alfred Q. R. and Egami, Takeshi},
abstractNote = {Water is ubiquitous on earth, but we know little about the real-space motion of molecules in liquid water. We demonstrate that high-resolution inelastic x-ray scattering measurement over a wide range of momentum and energy transfer makes it possible to probe real-space, real-time dynamics of water molecules through the so-called Van Hove function. Water molecules are found to be strongly correlated in space and time with coupling between the first and second nearest-neighbor molecules. The local dynamic correlation of molecules observed here is crucial to a fundamental understanding of the origin of the physical properties of water, including viscosity. The results also suggest that the quantum-mechanical nature of hydrogen bonds could influence its dynamics. Finally, the approach used here offers a powerful experimental method for investigating real-space dynamics of liquids.},
doi = {10.1126/sciadv.1603079},
journal = {Science Advances},
number = 12,
volume = 3,
place = {United States},
year = {2017},
month = {12}
}

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    Coherent X-rays reveal the influence of cage effects on ultrafast water dynamics
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